Exercise strap



FIG. 1 is a front perspective view of an exercise strap showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a rear perspective view thereof.

The broken lines in the drawings show stitching that form no part of the claimed design. 

CLAIM The ornamental design for an exercise strap, as shown and described. 